Placoid scales cannot grow in size, but rather more scales are added as the fish increases in size. Similar scales can also be found under the head of the denticle herring. The amount of scale coverage is much less in rays and chimaeras.The skin of sharks is entirely covered by placoid scales.lacoid scales cannot grow in size, but rather more scales are added as the fish increases in size. Similar scales can also be found under the head of the denticle herring. The amount of scale coverage is much less in rays and chimaeras.
Insulin pumps are the size of a pager and fit in your pocket. Most pumps are worn on a belt, carried in a pocket, or attached by a holster and connected by thin plastic tubing to the infusion set. An insulin pump is a small, computerized device that is programmed to deliver insulin into the fatty tissue under the skin.
Root canal therapy is a treatment used to repair and save a tooth that is badly decayed or infected. Root canal therapy is performed when the pulp which is composed of nerves and blood vessels in the tooth becomes infected or damaged. During root canal therapy, the pulp is removed, and the inside of the tooth is cleaned and sealed. People fear root canals because they assume they are painful. Actually, most people report that the procedure itself is no more painful than having a filling placed.